Composite door.



C. K. OLBEBG COMPOSITE DOOR.

APPLICATION FILED JAN-14.1915.

Patented Nov. 9, 1915.

2 SHEETS-SHEET I.

INVENTOR WITN ESSES:

ATTORNEY 0'. K1 OLBERGK COMPOSITE DOOR.

APPLICATION FILED JAN. 14. 1915.

1 ,1 59,41 1 Patented Nov. 9, 1915.

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CHARLES K. OLBERG, OF PHILADELPHIA, PENNSYLVANIA, ASSIGNOR. TO HALE AND KILBURN COMPANY, OF PHILADELPHIA, PENNSYLVANIA, A CORPORATION OF DELA'WARE.

COMPOSITE noon.

Specification of Letters Patent;

Patented Nov. 9, 11915.

Application filed January 14, 1915. Serial No. 2,121.

To all whom it may concern:

Be it known that I, CHARLES K. OLBERG, a subject of the King of Norway, and a res1- dent of Philadelphia, in the county of Philadelphia and State of Pennsylvanla, have invented certain new and useful I mprovements in Composite Doors, of which the following is a specification.

My invention relates to improvements in composite doors and particularly to a composite door having a fireproof core covered with wood on both sides. A construction of this type is disclosed in my application entitled Doors, Serial No. 857,581, filed August 19, 1914, in which is described a door having a core of asbestos or other lireproof material of poor heat conductlvlty, which core is held between two steel or other fireproof plates which are covered with wood, the steel plates being reinforced around the edges of the door by a continuous metallic reinforcing frame.

My present invention comprises details of construction in a door of this general char-' acter with particular reference to means for securing the wood or outside panels to the fireproof plates, and to means for securing the plates together and spacing the same apart the pro-per distance. By my invention, means are provided whereby the Wooden panels are secured to the fireproof plates, in assembling the door, 1n a particularly rapid, simple and effective manner. In accordance with my invention, one of the plates lies chiefly in a plane parallel to but spaced away from the other plate, the plate first referred to having depressed portions in which the fastening devices for the adjacent panel may be located. Specifically, these depressed portions take the form. preferably of grooves running the length of the door, the metal of the two plates being joined together as by welding at the bottom of the grooves, and the fastening devlces for the panels extending into the latter from the grooves or channels thus formed. In assembling the door, the panel on the outside of the plate having an entirely plane surface may be secured thereto by screws eX- tended through the bottoms of .the channels into the panel. The other panel, having securing devices attached thereto, may be then mounted in place against the other sheet with the securing devices of this panel eX- tending into the grooves and either engaging retaining devices secured to the bottoms of the channels or else being secured to the latter by means of additional members, such as slidable keys.

In order that a clearer understanding of my invention may be had, attention is hereby directed to the accompanying drawings forming part of this application and illustrating preferred embodiments thereof.

In the drawings, Figure 1 represents an elevation of the top portion of a door formed in accordance with one species of my invention, Fig. 2 is a partial horizontal section through the same, taken on an enlarged scale, Figs. 3 and a are partial sections taken with further enlargement on lines 33 and -14; respectively of Fig. 2, Fig. 5 is an elevation similar to Fig. 1 of a different form of my invention, Fig. 6 is a horizontal sec tion of the same, taken to an enlarged scale, and Figs. '7 and 8 are sections taken on a more greatly enlarged scale on lines 7-7 and 8 8 respectively of Fig. 6.

Referring first particularly to Figs. 1 to 4 inclusive of the drawings, the door illus trated is formed with a central core 1 of asbestos or other nonconducting material of poor heat conductivity mounted between plates 2 and 3 of steel or other fireproof material, the outside panels 4 and 5 preferably of wood being mounted against the outer surfaces of plates 2 and 3 respectively. Plate 2 lies entirely in one plane, Whereas plate 3 has portions, such as 6, which are parallel to but spaced away from plate 2, with the core 1 interposed between the same, these parallel portions of plate 3 being connected by portions bent toward and into contact with the inner surface of plate 2 to form grooves 7 running vertically the length of the door. These grooves or channels comprise side walls 8 and 9 and bottom walls 10, the latter being firmly connected at the points of contact to plate 2, preferably by electric spot welding. At the bottom of each channel is secured a flanged or hookshaped member 11, which I term a guide and which is secured to the bottom member 10 of each channel by electric spot welding or other means.

The two plates 2 and 3, connected together as described, are reinforced all the way around the outer edges of the door by the frame member 12 of metal or other fireproof material. Preferably, edge member 12 is formed with a face portion 13, flanges 14 bent back of and parallel to the face portion 13, the ends of the portions 14 being bent at right angles to form flanges 15 extending within the adjacent edges of plates 2 and 3. Flanges 15 are firmly connected to the inner surfaces of plates 2 and 3 adjacent the edges thereof, preferably a metallic brace member 16 being inserted between the flanges 15 and sheets 2 and 3, flanges 15 and brace members 16 all being connectedtogether by spot welding. The wooden panels 4 and 5 when positioned, have their edges abut against the flanges 11 of the edge members, the face portion 13 and the outwardly extending flanges 14 of the edge member thus protecting each edge of the door and preventing the passage of tire about the same. 7

The frame having been thus assembled, the wooden panel 4: is secured to plate 2 by any suitable means such as screws 17 ex tending into the panel from the interior of channels 7, these screws extending through openings in flanged guides 11, the bottom portions 10 of the channels and the adjacent metal of plate 2. The wooden panel 5 having flanged guides 18, similar to guides 11, secured thereto by means of screws 19 is then mounted in position against the plate 3, guides 18 extending throughout the length of channels 7, as also do guides 11. Panel 5 is then secured in position by means securing together guides 11 and 18, this means preferably comprising a channelshaped key 7 20 in each channel 7. These keys 20 are inserted into the channels 7 through holes in the top edge member 12 of the door and driven into position with the flanges of the keys embraced by the flanges of guides 11 and 18, thus firmly securing panel 5 to the plate 3.

The construction illustrated in Figs. 5 to 8 inclusive of the drawings is similar to that just described, except that a somewhat dif ferent form of device for securing panel 5 to plate 3 is used. In place of the guides 11 and 18 and keys 20 described, I use, in this form of my device, hooks 21 secured to plate 2 and hooks 22 secured to panel 5. In this construction, panel 4: is secured to plate 2 in the same manner as just described by screws 17 passing through the bottoms of the channels 7 into the panel 1. Hooks 21 are attached to the metal forming the bottoms of channels 7 by electric spot welding or other means and extend lengthwise of the channels 7 at an upward angle as shown. Hooks 22 may be secured directly to panel 5 by screws 19. Preferably, however, metal strips 23 are secured to panel 5 by the screws 19, hooks 22 being welded or otherwise secured to strips 23, the latter being adapted to fit within and run lengthwise of the channels 7.

To secure the panel 5 in place with this construction, it is necessary that the edge member at one edge of the door, namely, the

top of the door when the channels 7 run vertically, be made removable. .Such a removable top member is shown at 12 in Fig. 8, the bottom and side edge members 12 being preferably secured to the plates 2 and 3 in the same manner as described in connection with Figs. 1 to 1 of the drawings. At the top of the door, a metallic channel-shaped member 24: may be positioned within the edges of the plates 2 and 3 and'welded thereto through a brace member 16, or otherwise secured in position. The top member 12 may then be removably secured to the web of member 21 by screws 25 or otherwise.

Panel t having been secured to plate 2 and hooks 21 extending upwardly in channels 7 panel 5 may be positioned against plate 3 with metal strips 23 within channels 7 and hooks 22 extending downwardly therein. The panel 5 is then pushed downwardly, whereupon hooks 22 engage and interlock with hooks 21', the hooks interlocking with a wedging action and securely holding the panel 5 in position. The top member 12 may then be mounted in position by screws 25 as described.

It will be seen by my constructions de scribed, the wooden panels are mounted in position upon the steel plates of the door in a rapid and effective manner, and one in which the securing devices for the'panels are concealed within the body of the door, no screws or other means being extended through the outer surfaces of the door. The channels or grooves 7 are spaced apart at any desired distance, the provision of five such grooves for a door of three foot width, for example, being a suitable arrangement. As stated in the forms of my invention dc scribed, an asbestos or fireproof core is interposed between the spaced portions of the plates 2 and 3, and this core material may,

if desired, also be inserted loosely within.

the channels 7. In the form of my invention first described, the various thicknesses of metal interposed in each channel provide a considerable amount of protection against burning through the doors at these points. In the second form of my invention described, the strips 23 may rest against asbestos or other core material in the channels and if the panel should be burned through the strips 23 and core material behind the same Will furnish adequate protection.

Having now particularly described my invention, what I claim and desire to protect by Letters Patent is as follows:

1. In a door, the combination of a fireproof plate, a second fireproof plate having portions parallel to said first plate but spaced therefrom, and portions bent into contact with said first plate and secured thereto, a panel member secured to said first plate, a panel member contacting said parallel portions of said second plate, and securing means for said second panel member extending into .and held within the depressions formed in said second plate by said bent portions, substantially as set forth.

2. In a door, the combination of a fireproof plate, a second fireproof plate having portions parallel to said first plate but spaced therefrom, and portions bent toward said first plate to form recesses, a panel member secured to said first plate, a panel member contacting said parallel portions of said second plate, and securing means for said second panel member extending into said recesses, and held therein, substantially as set forth. I

3. In a door, the combination of a fireproof plate, a second fireproof plate having raised portions parallel to said first plate and depressed portions forming recesses below the plane of said raised portions, a panel member secured to said first plate, a panel member contacting said raised portions of said second plate, means secured to said second panel member extending into said recesses, and means held in said recesses for engaging and retaining said lastnamed means, substantially as set forth.

4:. In a door, the combination of a plate, a second plate having portions parallel to but spaced from said first plate, and intermediate portions bent into contact with said first plate and secured thereto, to form channels running the length of the door, a panel on the outer side of said first plate, screws extending through the walls of said channels into said panel, a panel on the outer side of said second plate, means secured thereto extending into said channels, and means se- Copies of cured to the walls of said channels engaging said last-named means, substantially as set forth.

5. In a door, the combination of a plate, a second plate having portions parallel to but spaced from said first plate, and intermediate portions bent into contact with said first plate and secured thereto, to form channels running the length of the door, a panel on the outer side of said first plate, a panel on the outer side of said second plate, an angular member secured to the bottom of each channel, a strip secured to the inner side of said second panel in line with and extending within each channel, and a member in each channel connecting and securing together said angular member and strip, substantially as set forth.

6. In a door, the combination of a plate, a second plate having portions parallel to but spaced from said first plate, and intermediate portions bent into contact with said first plate and secured thereto, to form channels running the length of the door, a panel on the outer side of said first plate, a panel on the outer side of said second plate, a flanged guide secured to the bottom of each channel, a flanged guide secured to the inner side of said second panel in line with and extending within each channel, and an angular key in each channel having flanges engaging Within and thus removably securing together the flanges of said guides, substantially as set fortl This specification signed and witnessed this 11th day of January, 1915.

CHARLES K. OLBERG.

this patent may be obtained for five cents each, by addressing the Commissioner of Paten Washington, D. C. 

